Absorbent Filaments from Cellulose Nanofibril Hydrogels through Continuous Coaxial Wet Spinning

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Absorbent Filaments from Cellulose Nanofibril Hydrogels through Continuous Coaxial Wet Spinning. / Lundahl, Meri J.; Klar, Ville; Ajdary, Rubina; Norberg, Nicholas; Ago, Mariko; Cunha, Ana Gisela; Rojas, Orlando J.

julkaisussa: ACS Applied Materials and Interfaces, Vuosikerta 10, Nro 32, 15.08.2018, s. 27287-27296.

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

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Bibtex - Lataa

@article{bd0dc7fdd232405ebc071c5c623de2d1,
title = "Absorbent Filaments from Cellulose Nanofibril Hydrogels through Continuous Coaxial Wet Spinning",
abstract = "A continuous and scalable method for the wet spinning of cellulose nanofibrils (CNFs) is introduced in a core/shell configuration. Control on the interfacial interactions was possible by the choice of the shell material and coagulant, as demonstrated here with guar gum (GG) and cellulose acetate (CA). Upon coagulation in acetone, ethanol, or water, GG and CA formed supporting polymer shells that interacted to different degrees with the CNF core. Coagulation rate was shown to markedly influence the CNF orientation in the filament and, as a result, its mechanical strength. The fastest coagulation noted for the CNF/GG core/shell system in acetone led to an orientation index of ∼0.55 (Herman's orientation parameter of 0.40), Young's modulus of ∼2.1 GPa, a tensile strength of ∼70 MPa, and a tenacity of ∼8 cN/tex. The system that underwent the slowest coagulation rate (CNF/GG in ethanol) displayed a limited CNF orientation but achieved an intermediate level of mechanical resistance, owing to the strong core/shell interfacial affinity. By using CA as the supporting shell, it was possible to spin CNF into filaments with high water absorption capacity (43 g water/g dry filament). This was explained by the fact that water (used as the coagulant for CA) limited the densification of the CNF core structure, yielding filaments with high accessible area and pore density.",
keywords = "absorbent filaments, coaxial filaments, continuous spinning, core/shell, nanocellulose, water absorption, wet spinning",
author = "Lundahl, {Meri J.} and Ville Klar and Rubina Ajdary and Nicholas Norberg and Mariko Ago and Cunha, {Ana Gisela} and Rojas, {Orlando J.}",
year = "2018",
month = "8",
day = "15",
doi = "10.1021/acsami.8b08153",
language = "English",
volume = "10",
pages = "27287--27296",
journal = "ACS Applied Materials and Interfaces",
issn = "1944-8244",
publisher = "AMERICAN CHEMICAL SOCIETY",
number = "32",

}

RIS - Lataa

TY - JOUR

T1 - Absorbent Filaments from Cellulose Nanofibril Hydrogels through Continuous Coaxial Wet Spinning

AU - Lundahl, Meri J.

AU - Klar, Ville

AU - Ajdary, Rubina

AU - Norberg, Nicholas

AU - Ago, Mariko

AU - Cunha, Ana Gisela

AU - Rojas, Orlando J.

PY - 2018/8/15

Y1 - 2018/8/15

N2 - A continuous and scalable method for the wet spinning of cellulose nanofibrils (CNFs) is introduced in a core/shell configuration. Control on the interfacial interactions was possible by the choice of the shell material and coagulant, as demonstrated here with guar gum (GG) and cellulose acetate (CA). Upon coagulation in acetone, ethanol, or water, GG and CA formed supporting polymer shells that interacted to different degrees with the CNF core. Coagulation rate was shown to markedly influence the CNF orientation in the filament and, as a result, its mechanical strength. The fastest coagulation noted for the CNF/GG core/shell system in acetone led to an orientation index of ∼0.55 (Herman's orientation parameter of 0.40), Young's modulus of ∼2.1 GPa, a tensile strength of ∼70 MPa, and a tenacity of ∼8 cN/tex. The system that underwent the slowest coagulation rate (CNF/GG in ethanol) displayed a limited CNF orientation but achieved an intermediate level of mechanical resistance, owing to the strong core/shell interfacial affinity. By using CA as the supporting shell, it was possible to spin CNF into filaments with high water absorption capacity (43 g water/g dry filament). This was explained by the fact that water (used as the coagulant for CA) limited the densification of the CNF core structure, yielding filaments with high accessible area and pore density.

AB - A continuous and scalable method for the wet spinning of cellulose nanofibrils (CNFs) is introduced in a core/shell configuration. Control on the interfacial interactions was possible by the choice of the shell material and coagulant, as demonstrated here with guar gum (GG) and cellulose acetate (CA). Upon coagulation in acetone, ethanol, or water, GG and CA formed supporting polymer shells that interacted to different degrees with the CNF core. Coagulation rate was shown to markedly influence the CNF orientation in the filament and, as a result, its mechanical strength. The fastest coagulation noted for the CNF/GG core/shell system in acetone led to an orientation index of ∼0.55 (Herman's orientation parameter of 0.40), Young's modulus of ∼2.1 GPa, a tensile strength of ∼70 MPa, and a tenacity of ∼8 cN/tex. The system that underwent the slowest coagulation rate (CNF/GG in ethanol) displayed a limited CNF orientation but achieved an intermediate level of mechanical resistance, owing to the strong core/shell interfacial affinity. By using CA as the supporting shell, it was possible to spin CNF into filaments with high water absorption capacity (43 g water/g dry filament). This was explained by the fact that water (used as the coagulant for CA) limited the densification of the CNF core structure, yielding filaments with high accessible area and pore density.

KW - absorbent filaments

KW - coaxial filaments

KW - continuous spinning

KW - core/shell

KW - nanocellulose

KW - water absorption

KW - wet spinning

UR - http://www.scopus.com/inward/record.url?scp=85050472591&partnerID=8YFLogxK

U2 - 10.1021/acsami.8b08153

DO - 10.1021/acsami.8b08153

M3 - Article

VL - 10

SP - 27287

EP - 27296

JO - ACS Applied Materials and Interfaces

JF - ACS Applied Materials and Interfaces

SN - 1944-8244

IS - 32

ER -

ID: 28895357